Handle for screw drivers or the like



. A. G. RossNER HANDLE FOR SCREW DRIVERS OR THE LIKE Filed July 20. 1954Dec. 25, 1956 Albert 6. Rassner INVENTOR.

' 1 By gum only 5.

United States Patent HANDLE FOR SCREW DRIVERS OR THE LIKE 7 Albert G.Rossner, Westminster, Mass.

Application July 20, 1954, Serial No. 444,540

1 Claim. (Cl. 145-61) The present invention relates to new and usefulimprovements in tool handles for use with screw driver and other toolswhere a turning movement is imparted to objects engaged by the tool.

An important object of the present invention is to provide a handlecomposed of a main tool turning portion and a cap portion at the rearend ofthe handle and which is engaged by the palm of the hand andremains stationary therein while the tool is being turned to enable thetool to be subjected to constant pressure by the hand of the person.

Another object of the invention is to provide novel pivotal connectingmeans for the cap portion of the handle and constructed to reducefriction during relative turning movement of one part of :the handlewith respect to the other.

A still further object is to provide a tool of this character of simpleand practical construction, which is effi cient and reliable inoperation, relatively inexpensive to manufacture and otherwise welladapted for the purpose for which the same is intended.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a .part hereof, whereinlike numerals refer to like parts throughout, and in which:

Figure l is a perspective view;

Figure 2 is an enlarged fragmentary longitudinal sec tional view takenon the line 2-2 of Figure 1; and

Figure 3 is a group perspective view of the pivotal connecting means forthe cap portion of the handle.

Referring now to the drawing in detail wherein for the purpose ofillustration I have disclosed a preferred embodiment of invention thenumeral 5 designates the blade or shank portion of a screw driver towhich a main handle portion 6 is rigidly secured. The handle 6 may be ofplastic or other suitable material.

The rear end portion of the main handle 6 is formed with alongitudinally extending bore 7 in which one end of a pivot pin or shaft8 is secured with a pressed fit or otherwise suitably secured in a fixedposition to the handle. The other end of the shaft pin 8 projectsrearwardly beyond the handle 6 and is provided with a conicaldiametrically enlarged head 9 to provide a shoulder 10 on a flangeportion 11 and a conical tip 12.

A cap 13 is constructed of material similar to the main handle 6 and isformed with a bore 14 in which a buslr ing 15 is retained by a pressedfit or otherwise suitably secured in a fixed position in the cap. Therear end of the bushing 15 is formed with a counterbore 16 toaccommodate the flange 11 of the head 9 of the pin or 2,775,276 PatentedDec. 25, 1956 ice shaft 8 and with suflicient clearance to reducefriction to a minimum during rotation of the cap on the pin or shaft.

The rear end of the bore 14 is closed and is formed with a conicalcounterbore 17 to accommodate the conical tip 12 of the head 9 of thepin or shaft 8. The counterbore 17 is constructed of sufiicient depth toprovide clearance between the tip 12 and the counterbore so that contactof the head 9 with the counterbore 17 is limited to the shoulder 18 atthe periphery of flange 11 and at the point where the tip 12 merges withthe flange.

By reason of the reduced contacting area between the head 9 of the pinor shaft 8 and the counterbore 17 in the cap 13 friction is reduced to aminimum during rotation of the cap on the pin.

Clearance is also provided between the rear end of the handle 6 and thecap 13, as indicated at 19, to further reduce friction during therotation of the cap.

In the operation of the device the fingers of a person grip the mainportion 6 of the handle while the palm of the hand bears against the cap13. Accordingly, the main handle portion 6 and blade 5 are free to turnwhile the cap 13 remains stationary so that constant pressure may besubjected to the tool while the same is being turned.

From the foregoing, the construction and operation of the device will bereadily understood and further explanation is believed to beunnecessary. However, since numerous modifications and changes willreadly occur to those skilled in the art, it is not desired to limit theinvention to the exact construction shown and described, .andaccordingly, all suitable modifications and equivalents may be resortedto, falling within the scope of the appended claim.

What is claimed as new is as follows:

A tool handle comprising a main handle part, a cap at the rear end ofthe main handle part, and means rotatably connecting the cap to the mainhandle part and including a pin having one end anchored axially in themain handle part and projecting rearwardly therefrom, .a diametricallyenlarged flange on the rear end of the pin, said cap having a dead endbore in which the pin is received in a concealed position and said borehaving an inwardly tapering counterbore at its dead end overlying theflange and in which the flange is received the surface of said taperedcounterbore being arranged at an angle to the periphery of the flangeand with the rear corner only of the flange in contact with the taperedsurface of the counterbore to reduce the point of contact of the flangetherewith to a minimum, and a bushing fixed in the bore of the cap andbehind which the flange is positioned to retain the cap on the pin.

References Cited in the file of this patent UNITED STATES PATENTS 39,151King July 7, 1863 139,876 Daboll June 17, 1873 470,687 Koelzer Mar. 15,1892 1,643,901 Peterson Sept. 27, 1927 1,752,703 Simpson Apr. 1, 19302,324,839 Haumerson July 20, 1943 2,351,705 Prall June 20, 19442,564,356 Diand-a Aug. 14, 1951 FOREIGN PATENTS 620,451 Great BritainMar. 24, 1949

